Malicious PDF — malware analysis report

Static analysis result for SHA-256 132c9a4f1e6f97c8…

MALICIOUS

PDF

39.6 KB Created: 2020-06-14 22:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d419b33054cd702776837f4c8ef458c SHA-1: 7f78ce291e0f87fa4f03fb20d7f3af9d19ffdaa1 SHA-256: 132c9a4f1e6f97c894bd46b5f5f7f9f3ec756e465a1270faaf954f074409c322
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded links suggest an attempt to drive traffic to potentially harmful websites, possibly as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://vegtravel.voyagerwebsites.com/uploads/1/3/1/8/131871780/131871780.html#thermodynamics+pdf+ebook+free+download
    • http://holistichealinggranada.com/uploads/1/3/0/6/130604775/dowusoxo_wawif.pdf
    • http://uwl-yihuang.com/uploads/1/3/1/4/131453610/patosimebetesugif.pdf
    • http://partyuniversity.org/uploads/1/3/0/7/130775002/a81588338b6d.pdf
    • http://thecatefarm.com/uploads/1/3/0/6/130639842/minolifudawoxes_wofol_bewovovo_detoravuf.pdf
    • http://harrisonsolisatservices.com/uploads/1/3/0/8/130874559/demupedari.pdf
    • http://mta-sts.mail.carmelbayhoa.com/uploads/1/3/1/4/131438324/553625.pdf
    • http://freetoteachvt.com/uploads/1/3/0/9/130969724/f3b2f.pdf
    • http://28y.undesirable.us/uploads/1/3/0/4/130435875/wutejakafixuzer-nogozila.pdf
    • http://embracebirthphotography.co.nz/uploads/1/3/0/5/130543141/6670935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wufubupaku.files.wordpress.com/2020/06/rumuloteriwarapaxojap.pdf
    • https://rajubap.files.wordpress.com/2020/06/kijuzoxeni.pdf
    • https://rilodojo.files.wordpress.com/2020/06/fetefizawupuf.pdf
    • https://lixomepap.files.wordpress.com/2020/06/64958363054.pdf
    • https://demexikil.files.wordpress.com/2020/06/wegesowovofo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006406.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 2116 bytes
font_01_sfnt_off00006dcf.bin
98d4150a8afa9134b4466feb821c9ad802200fb3ed284f829e880463ebbeece9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 10084 bytes

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